142 FOBTY-FIRST REPORT ON THE StATE MuSEUM. 



Tortrix fumiferana, or the spruce-bud worm, has been very 

 destructive to spruces in portions of Maine, as observed and reported 

 by Dr. Packard. It has occurred in very large numbers in some 

 localities, where it has caused the death of a large number of trees, 

 by eating off the buds in June as they were developing, and arresting 

 the new growth. In a few instances only, it has been detected feed- 

 ing on hemlock. It is found, also, in Massachusetts, New York, 

 Pennsylvania, Ohio, Illinois and Wisconsin. 



Gelechia abietisella is a small insect belonging to the Tineidce. It is 

 known, up to the present, only on the hemlock, in which the cater- 

 pillar causes dead patches on the smaller twigs by biting off and 

 weaving together several of the leaves into a broad, flat, irregular 

 case, within which it lives in a rude silken tube. 



The Coleopterous larvse infesting the hemlock, are of greater 

 economic importance, as they are all borers in the trunk, limbs and 

 twigs, or excavate smaller burrows between the wood and bark. 



The Dicerca sp? was found under the bark of a dead tree. Most of 

 the species of this genus burrow in the sap-wood a little beneath the 

 bark, and usually attack trees only of an impaired vitality. 



Hadrohregmus foveatus has been found not very abundantly, not only 

 in logs and in stripped and piled bark, but also within the bark of 

 large healthy trees (Packard). It belongs to the destructive family of 

 Ftinidce, which contains a large number of species, mostly o± small 

 size, and of injurious habits, although more generally living in vege- 

 table matter in an incipient stage of decay. 



Orthosoma hrunneum is a common and well-known longicorn beetle, 

 of a large size, the larva of which sometimes measures two inches in 



length. It is a member of the ex- 

 tensive family of Gerambycidce, con- 

 sisting of an immense number of 

 species — some of remarkable size 

 and great beauty. Their larvae sub- 

 sist exclusively on the woody parts of 

 plants, within the trunks, branches 

 and roots of trees. 0. hrunneum is 

 generally distributed over the Atlan- 

 tic States, but fortunately its attack 

 is usually confined to dead or dying 

 trees, unlike a closely allied species 

 formerly embraced in the same 

 genus with it, viz., Pr^ionus laticollis, 

 which, at times and in certain locali- 

 ties,is very destructive to grape vines 

 and apple and pear trees, which it 



(^iG. 3. — Obthosoma beunnbum. (After kills by burrowing into their roots. 

 Emmons.) 



